18 lines
417 B
Ruby
18 lines
417 B
Ruby
# write a function to determine the minimum number of coins used that sum to a value
|
|
# ex coins = [1, 3, 5] total = 11
|
|
|
|
def min_change_sum(coins, total)
|
|
totals = Array.new(total + 1, 1_000_000_000_000)
|
|
totals[0] = 0
|
|
|
|
(1..total).each do |i|
|
|
coins.each do |coin|
|
|
if coin <= i && (totals[i - coin] + 1 < totals[i])
|
|
totals[i] = totals[i - coin] + 1
|
|
end
|
|
end
|
|
end
|
|
|
|
totals[total]
|
|
end
|